For the most part, it’s simple. Your car or truck has a battery, it supplies electricity to the bits that need it, and that’s all you care about. Until something goes wrong or you want to do something ...

Cars, trucks, RVs, and motorhomes run dual 12-volt batteries for various reasons. Depending on how you wire a two-battery 12-volt system, the result can be a 12-volt system or a 24-volt system—or even ...

(HWT Note: This is the first part in a three part series on understanding 12-volt batteries, which includes tips on improving battery function and longevity). It’s always nice talking to an expert. To ...

I'm sure anyone who's ever jump-started a car, replaced a car battery, or built a small 12V DIY nipple-torture device has seen this: a powdery, white and blue and maybe sometimes green substance on ...